Struct Condvar

pub struct Condvar(/* private fields */);

Wrapper around std::sync::Condvar.

Allows TracingMutexGuard to be used with a Condvar. Unlike other structs in this module, this wrapper does not add any additional dependency tracking or other overhead on top of the primitive it wraps. All dependency tracking happens through the mutexes itself.

Panics

This struct does not add any panics over the base implementation of Condvar, but panics due to dependency tracking may poison associated mutexes.

Examples

use std::sync::Arc;
use std::thread;

use tracing_mutex::stdsync::tracing::{Condvar, Mutex};

let pair = Arc::new((Mutex::new(false), Condvar::new()));
let pair2 = Arc::clone(&pair);

// Spawn a thread that will unlock the condvar
thread::spawn(move || {
    let (lock, condvar) = &*pair2;
    *lock.lock().unwrap() = true;
    condvar.notify_one();
});

// Wait until the thread unlocks the condvar
let (lock, condvar) = &*pair;
let guard = lock.lock().unwrap();
let guard = condvar.wait_while(guard, |started| !*started).unwrap();

// Guard should read true now
assert!(*guard);

Implementations

impl Condvar

pub const fn new() -> Self

Creates a new condition variable which is ready to be waited on and notified.

pub fn wait<'a, T>( &self, guard: MutexGuard<'a, T>, ) -> LockResult<MutexGuard<'a, T>>

Wrapper for std::sync::Condvar::wait.

pub fn wait_while<'a, T, F>( &self, guard: MutexGuard<'a, T>, condition: F, ) -> LockResult<MutexGuard<'a, T>>

where F: FnMut(&mut T) -> bool,

Wrapper for std::sync::Condvar::wait_while.

pub fn wait_timeout<'a, T>( &self, guard: MutexGuard<'a, T>, dur: Duration, ) -> LockResult<(MutexGuard<'a, T>, WaitTimeoutResult)>

Wrapper for std::sync::Condvar::wait_timeout.

pub fn wait_timeout_while<'a, T, F>( &self, guard: MutexGuard<'a, T>, dur: Duration, condition: F, ) -> LockResult<(MutexGuard<'a, T>, WaitTimeoutResult)>

where F: FnMut(&mut T) -> bool,

Wrapper for std::sync::Condvar::wait_timeout_while.

pub fn notify_one(&self)

Wrapper for std::sync::Condvar::notify_one.

pub fn notify_all(&self)

Wrapper for std::sync::Condvar::notify_all.

Trait Implementations

impl Debug for Condvar

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Condvar

fn default() -> Condvar

Returns the “default value” for a type.